{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "6ec2db41",
   "metadata": {},
   "source": [
    "-----------\n",
    "* 记录人：林智宇\n",
    "* 时间：2021-11-25\n",
    "* week13\n",
    "* 主要参考文档：\n",
    "> 1. [Python官方文档](https://python)\n",
    "> 2. [gitee课堂笔记](https://gitee.com/xzhichao/python)\n",
    "> 3. [许老师博客](https://www.cnblogs.com/xuzhichao)\n",
    "-----------"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1c0870cd",
   "metadata": {},
   "source": [
    "## 上周回顾\n",
    "### Json(文本数据)--->Dict(python中的字典数据)\n",
    "### 字典和列表的综合实践\n"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6ef74d9a",
   "metadata": {},
   "source": [
    "# 2. 本周内容：\n",
    "\n",
    "## 2.1 [集合]()\n",
    "\n",
    "> 1. 集合的性质\n",
    ">> 1. 无序(unordered)\n",
    ">> 2. 不重复(no duplicate)\n",
    "> 2. 集合的一般方法\n",
    ">> 1. 增加 \n",
    ">> 2. 删除\n",
    ">> 3. 查询：in查询成员关系\n",
    "> 3. 集合的数学逻辑运算"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "94525494",
   "metadata": {},
   "source": [
    "#### 1. 集合的性质及概念\n",
    "* 思考：我想了解一组数据中有哪些唯一存在的值？（假如是列表list）\n",
    "* list_age = [18,24,25,24,18,23,18,18,18,3]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "e7741f77",
   "metadata": {},
   "outputs": [],
   "source": [
    "no_duplicate_age = []\n",
    "list_age = [18,24,25,24,18,23,18,18,18,3]\n",
    "for i in list_age:\n",
    "    if i not in no_duplicate_age:\n",
    "        no_duplicate_age.append(i)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "4edaa100",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[18, 24, 25, 23, 3]"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "no_duplicate_age"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "9f9c866e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{3, 18, 23, 24, 25}\n"
     ]
    }
   ],
   "source": [
    "# list ---> set 的方法：set()\n",
    "no_duplicate_age_set = set(list_age)\n",
    "print(no_duplicate_age_set)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "447814ba",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'123', '哈哈', '666', 'banana'}\n",
      "True\n",
      "False\n"
     ]
    }
   ],
   "source": [
    "# 测试代码\n",
    "# 1. 移除重复项\n",
    "number = {'123','哈哈','哈哈','666','banana','123'}\n",
    "print(number)\n",
    "# 2. in 查询成员关系\n",
    "print('666' in number)\n",
    "print('6' in number)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "166ae617",
   "metadata": {},
   "source": [
    "## 2.集合的一般方法"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "917c2f92",
   "metadata": {},
   "source": [
    "* 集合的创建的两种一般方法：\n",
    "> 1. set(list)\n",
    "> 2. 直接按照集合的结构创建：{value1,value2,value3,...}"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "bcde7b99",
   "metadata": {},
   "source": [
    "> 1. 增加add()\n",
    ">> * 结果：add():Add an element to a set.\n",
    ">> * 注意：This has no effect if the element is already present."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "25fee5bd",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "set_1 = set([1,3,0,23,66,10])\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "bd6809db",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function add:\n",
      "\n",
      "add(...) method of builtins.set instance\n",
      "    Add an element to a set.\n",
      "    \n",
      "    This has no effect if the element is already present.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.add)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "46b33303",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 9, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "set_1.add(9)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "55690feb",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{0, 1, 66, 3, 9, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "set_1.add(23)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "03727ffc",
   "metadata": {},
   "source": [
    "> 2. 删除\n",
    ">> 1. pop():Remove and return an arbitrary set element.\n",
    ">> 2. remove()\n",
    ">> 3. discard()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "6c40724d",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function pop:\n",
      "\n",
      "pop(...) method of builtins.set instance\n",
      "    Remove and return an arbitrary set element.\n",
      "    Raises KeyError if the set is empty.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.pop)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "444266fd",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1, 3, 9, 10, 23}\n",
      "{3, 9, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "# 1.Remove and return an arbitrary set element.\n",
    "print(set_1)\n",
    "set_1.pop()\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "5d716b0c",
   "metadata": {},
   "outputs": [
    {
     "ename": "KeyError",
     "evalue": "'pop from an empty set'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-37-44458b38ab30>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m# 2.Raises KeyError if the set is empty.\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      2\u001b[0m \u001b[0mset_2\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mset\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 3\u001b[1;33m \u001b[0mset_2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mpop\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m: 'pop from an empty set'"
     ]
    }
   ],
   "source": [
    "# 2.Raises KeyError if the set is empty.\n",
    "set_2 = set([])\n",
    "set_2.pop()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "7dac96c8",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function remove:\n",
      "\n",
      "remove(...) method of builtins.set instance\n",
      "    Remove an element from a set; it must be a member.\n",
      "    \n",
      "    If the element is not a member, raise a KeyError.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.remove)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "741dc5e6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1, 66, 3, 9, 10, 23}\n",
      "{1, 3, 9, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "# 1.Remove an element from a set; it must be a member.\n",
    "print(set_1)\n",
    "set_1.remove(66)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "26751772",
   "metadata": {},
   "outputs": [
    {
     "ename": "KeyError",
     "evalue": "66",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m                                  Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-30-128ecf07c538>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m# 2.If the element is not a member, raise a KeyError.\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[0mset_1\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mremove\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m66\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mKeyError\u001b[0m: 66"
     ]
    }
   ],
   "source": [
    "# 2.If the element is not a member, raise a KeyError.\n",
    "set_1.remove(66)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "ea6ad37b",
   "metadata": {},
   "outputs": [],
   "source": [
    "# * 避免Key Error的方式：\n",
    "if 66 in set_1:\n",
    "    set_1.remove(66)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "id": "3bca024a",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function discard:\n",
      "\n",
      "discard(...) method of builtins.set instance\n",
      "    Remove an element from a set if it is a member.\n",
      "    \n",
      "    If the element is not a member, do nothing.\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.discard)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "e158bfc2",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{1, 3, 9, 10, 23}\n"
     ]
    }
   ],
   "source": [
    "set_1.discard(66)\n",
    "print(set_1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "59a6274b",
   "metadata": {},
   "source": [
    "## 3.集合的运算\n",
    "\n",
    "> 1. 集合的交集\n",
    "> 2. 集合的并集\n",
    "> 3. 集合的差集"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "a3f8d67e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n"
     ]
    }
   ],
   "source": [
    "set_1 = set([1,2,5,6,7,2,3,2,4,4])\n",
    "set_2 = set([1,3,4,0,8,66,7])\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "4813fada",
   "metadata": {},
   "source": [
    "> 1. 集合的交集\n",
    ">> 1. 使用集合的方法：set_1.intersection(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 & set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "b641e9b4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function intersection:\n",
      "\n",
      "intersection(...) method of builtins.set instance\n",
      "    Return the intersection of two sets as a new set.\n",
      "    \n",
      "    (i.e. all elements that are in both sets.)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.intersection)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "id": "eed2d320",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果: {1, 3, 4, 7}\n"
     ]
    }
   ],
   "source": [
    "# 使用集合的方法：set_1.intersection(set_2)\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"交集结果:\",set_1.intersection(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "id": "5490e750",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果: {1, 3, 4, 7}\n"
     ]
    }
   ],
   "source": [
    "# 使用逻辑运算符：set_1 & set_2\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"交集结果:\",set_1 & set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "id": "cb138e42",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 实践\n",
    "set_1_xu = {\"星期一12-14\",\"星期二3-5\",\"星期二12-14\"}\n",
    "set_2_前端 = {\"星期二3-5\",\"星期二12-14\"}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "id": "4d86e659",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{'星期二12-14', '星期二3-5'}\n",
      "结论：周一班 让给前端的同学！\n"
     ]
    }
   ],
   "source": [
    "print(set_1_xu & set_2_前端)\n",
    "print(\"结论：周一班 让给前端的同学！\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "825a3673",
   "metadata": {},
   "source": [
    "> 2.集合的并集\n",
    ">> 1. 使用并集的方法：set_1.union(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 | set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "id": "1d656471",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果: {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n"
     ]
    }
   ],
   "source": [
    "# 1. 使用并集的方法：set_1.union(set_2)\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"交集结果:\",set_1.union(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "id": "d820da0c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果: {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n"
     ]
    }
   ],
   "source": [
    "# 2. 使用逻辑运算符：set_1 | set_2\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"交集结果:\",set_1 | set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "id": "48ebf73d",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "开始的时间： 1637810977.0945938\n",
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "交集结果: {0, 1, 2, 3, 4, 5, 6, 7, 66, 8}\n",
      "结束的时间： 1637810977.0945938\n",
      "运行的时间： 0.0\n"
     ]
    }
   ],
   "source": [
    "# 计算运行效率 = 运行后的时间节点 - 运行前的时间节点 ： 思考并对比列表运算的执行效率\n",
    "import time\n",
    "start_time = time.time()\n",
    "print(\"开始的时间：\",start_time)\n",
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"交集结果:\",set_1 | set_2)\n",
    "stop_time = time.time()\n",
    "print(\"结束的时间：\",stop_time)\n",
    "print(\"运行的时间：\",start_time - stop_time)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0566f4d8",
   "metadata": {},
   "source": [
    "> 3.集合的差集\n",
    ">> 1. 使用差集的方法：set_1.difference(set_2)\n",
    ">> 2. 使用逻辑运算符：set_1 - set_2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 58,
   "id": "0fd39a65",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "set_1 和 set_2 差集结果: {2, 5, 6}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"set_1 和 set_2 差集结果:\",set_1.difference(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 59,
   "id": "a34455de",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "set_1 和 set_2 差集结果: {0, 8, 66}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"set_2 和 set_1 差集结果:\",set_2.difference(set_1))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 60,
   "id": "654184ce",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "set_1 和 set_2 差集结果: {2, 5, 6}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"set_1 和 set_2 差集结果:\",set_1 - set_2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 61,
   "id": "96f1ac0b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "set_2 和 set_1 差集结果: {0, 8, 66}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"set_2 和 set_1 差集结果:\",set_2 - set_1)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ca9d062f",
   "metadata": {},
   "source": [
    "> 4. 对称差集\n",
    ">> 1. 用对称差集的方法：set_1.symmetric_difference(set_2)\n",
    ">> 2. 使用逻辑运算符：？ (set_1 - set_2) | (set_2 - set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 65,
   "id": "43531e88",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on built-in function symmetric_difference:\n",
      "\n",
      "symmetric_difference(...) method of builtins.set instance\n",
      "    Return the symmetric difference of two sets as a new set.\n",
      "    \n",
      "    (i.e. all elements that are in exactly one of the sets.)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(set_1.symmetric_difference)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 67,
   "id": "f63348e7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "对称差集结果: {0, 66, 2, 5, 6, 8}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"对称差集结果:\",set_1.symmetric_difference(set_2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 68,
   "id": "508912f3",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "set_1: {1, 2, 3, 4, 5, 6, 7}\n",
      "set_2: {0, 1, 66, 3, 4, 7, 8}\n",
      "对称差集结果: {0, 2, 66, 5, 6, 8}\n"
     ]
    }
   ],
   "source": [
    "print(\"set_1:\",set_1)\n",
    "print(\"set_2:\",set_2)\n",
    "print(\"对称差集结果:\",(set_1 - set_2) | (set_2 - set_1))"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "56071bda",
   "metadata": {},
   "source": [
    "集合实践：(P129)\n",
    "\n",
    "```\n",
    "vowels = set('aeiou')\n",
    "word = input(\"Provide a word to search for vowels:\")\n",
    "found = vowels.intersection(set(word))\n",
    "for vowel in found:          \n",
    "    print(vowel)\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "e2331472",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "vowels :  {'o', 'u', 'i', 'e', 'a'}\n",
      "Provide a word to search for vowels:hello linzhiyu\n",
      "word :  {'z', 'o', 'h', 'u', 'i', 'e', 'n', ' ', 'y', 'l'}\n",
      "{'o', 'i', 'e', 'u'}\n"
     ]
    }
   ],
   "source": [
    "vowels = set('aeiou')\n",
    "print(\"vowels : \",vowels)\n",
    "word = input(\"Provide a word to search for vowels:\")\n",
    "print(\"word : \",set(word))\n",
    "found = vowels.intersection(set(word))\n",
    "print(found)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "dfaaf54b",
   "metadata": {},
   "source": [
    "## 课后作业：\n",
    "> 课堂练习\n",
    "<br/>课本第三章 课后项目练习\n",
    "<br/>总结集合方法"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1e3e7c82",
   "metadata": {},
   "source": [
    "* 课本第三章 课后项目练习 : 在另一个文件有"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2dd5d5e9",
   "metadata": {},
   "source": [
    "* 总结集合方法\n",
    " 一、集合的性质：无序、不重复\n",
    " \n",
    " 二、集合的一般方法：\n",
    "> 集合创建的两种一般方法：\n",
    "<br/> set(list)\n",
    "<br/> 直接按照集合的结构创建：{value1,value2,value3,...}\n",
    "\n",
    "> 1.增加add()\n",
    "<br/> 2.删除\n",
    ">> 1. pop():Remove and return an arbitrary set element.\n",
    ">> 2. remove()\n",
    ">> 3. discard()\n",
    "\n",
    "> 3.查询：in查询成员关系\n",
    " \n",
    " 三、集合的数学逻辑运算\n",
    "> 1.集合的交集\n",
    ">> a.使用集合的方法：set_1.intersection(set_2)\n",
    ">><br/>b.使用逻辑运算符：set_1 & set_2\n",
    "\n",
    "> 2.集合的并集\n",
    ">> a.使用并集的方法：set_1.union(set_2)\n",
    ">> <br/>b.使用逻辑运算符：set_1 | set_2\n",
    "\n",
    "> 3.集合的差集\n",
    ">> a.使用差集的方法：set_1.difference(set_2)\n",
    ">> <br/>b.使用逻辑运算符：set_1 - set_2\n",
    "\n",
    "> 4.对称差集\n",
    ">> a.用对称差集的方法：set_1.symmetric_difference(set_2)\n",
    ">> <br/>b.使用逻辑运算符：？ (set_1 - set_2) | (set_2 - set_1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "943736ec",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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